Vue ERROR TypeError: Cannot read property 'upgrade' of undefined

Others 2019-08-08 19:02:38 views: null

Vue error when running the project, and finally resolved, the following URLs:

https://segmentfault.com/a/1190000019532841；

Screenshot follows ( * .env you want to define a variable, an error will be commented out ):

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Origin www.cnblogs.com/sherlock-Ace/p/11320224.html

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